# A009266 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 -2
4 0
5 16
6 40
7 -272
8 -1792
9 5696
10 97536
11 -58112
12 -6692224
13 -14752256
14 566971392
15 3293370624
16 -57170149376
17 -629890867200
18 6512209063936
19 128178697854976
20 -759960372641792
21 -28999010130804736
22 64032469498658816